CVE-2021-38646
high
Microsoft
⚠️ CISA KEV — Exploited in the Wild
CVSS v3 Base Score
7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score
4.4%
Exploitation probability in 30 days
Top 10% most likely to be exploited
Attack Characteristics
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Published: September 15, 2021 (1818 days ago)
Last Modified: August 10, 2026
Vendor: Microsoft
Source: NVD
⚠️ CISA Known Exploited Vulnerability
Added to KEV: 2022-03-28
Remediation Due: 2022-04-18 (⚠ 1604d overdue)
Ransomware Campaign: Known
Vulnerability Report
Generated by CyberWatcher
Description
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
CWE
NVD-CWE-noinfoAffected Products
microsoft 365 appsmicrosoft officemicrosoft office 2016microsoft office 2019